Tv signal loss when 2nd Sat cable inserted

alan partridge aha · 12-11-2018 6:57pm #1

Ok as the title suggests, the tv signal deteriorates/complete loss when 2nd Sat cable inserted on Sky+ HD box.

This happens only on some channels and once only 1 cable in all channels ok. No good for recording though.

I have a quad lnb and in another room I have a non sky box connected to tv as well as a saorview aerial. When Sat box is on standby saorview signal is good. Once box is switched on saorview signal goes right down.

Could it be lnb do you think?

tsue921i8wljb3 · 12-11-2018 7:14pm

alan partridge aha wrote: »

Ok as the title suggests, the tv signal deteriorates/complete loss when 2nd Sat cable inserted on Sky+ HD box.

This happens only on some channels and once only 1 cable in all channels ok. No good for recording though.

I have a quad lnb and in another room I have a non sky box connected to tv as well as a saorview aerial. When Sat box is on standby saorview signal is good. Once box is switched on saorview signal goes right down.

Could it be lnb do you think?

I'm a bit confused now about the setup. Is this correct or have I got it wrong from your other post?

Room A:

Sky+ HD box with two cables A and B. Sky box operates fine with cable A connected but loses satellite signal with cables A and B connected.

Room B:
Generic satellite box connected with one cable C. TV connected to aerial with cable D.

Saorview reception is fine while generic box is in standby but is unreliable when satellite box is on.

alan partridge aha · 12-11-2018 8:37pm

Elora Future Pony wrote: »

I'm a bit confused now about the setup. Is this correct or have I got it wrong from your other post?

Room A:

Sky+ HD box with two cables A and B. Sky box operates fine with cable A connected but loses satellite signal with cables A and B connected.

Room B:
Generic satellite box connected with one cable C. TV connected to aerial with cable D.

Saorview reception is fine while generic box is in standby but is unreliable nwgen satellite box is on.

In Room A, sometimes you'll have all channels however a lot of the time you'll lose some. E.g. Dave, Tcm and others. If you go to your signal strength in sky+box it will weaken when 2nd cable is inserted.

Room B is as you stated. I have double co ax sckts in each room.

tsue921i8wljb3 · 12-11-2018 8:50pm

alan partridge aha wrote: »

In Room A, sometimes you'll have all channels however a lot of the time you'll lose some. E.g. Dave, Tcm and others. If you go to your signal strength in sky+box it will weaken when 2nd cable is inserted.

Room B is as you stated. I have double co ax sckts in each room.

You've now thrown sockets into the mix. It could also be them if they are a cheap unscreened type.

http://www.satcure.co.uk/tech/wall_plates.htm

To be honest with you I could be guessing here all night but without seeing the installation and having the correct test equipment it's unlikely that I'm going to be able to tell you what's wrong. I'd get a professional installer in to check it out.

NewClareman · 12-11-2018 9:01pm

alan partridge aha wrote: »

In Room A, sometimes you'll have all channels however a lot of the time you'll lose some. E.g. Dave, Tcm and others. If you go to your signal strength in sky+box it will weaken when 2nd cable is inserted.

Room B is as you stated. I have double co ax sckts in each room.

As Navi said, it’s difficult to provide advice, based on the information given. If it were me, and I didn’t have any test equipment, I’d try and use the boxes themselves as the test equipment. Most TVs have an installer menu where you can read signal strength and quality.

To me the breakup of the terrestrial signal indicates that the signal is very weak and breakup occurs due to interference when the satellite cable is plugged in. If you can see the strength on the tv, it should be easy to check that out.

alan partridge aha · 12-11-2018 9:12pm

In menu of TV you can see saorview signal weaken when generic Sat box turned on. Room B

In menu of Sky + box you can see signal weaken when 2nd cable Inserted. Room A.

mr_cochise · 12-11-2018 9:18pm

The fact that the saorview signal is also affected is really confusing. Is the saorview cable looped through either of the sat receivers?

Johnboy1951 · 12-11-2018 9:20pm

mr_cochise wrote: »

The fact that the saorview signal is also affected is really confusing. Is the saorview cable looped through either of the sat receivers?

.... or combined with one of the Sat cables?

Tigerandahalf · 12-11-2018 9:24pm

Have you a long run from the satellite dish to the boxes?

Is the saorview signal coming down the same cable as the satellite signal?

I have satellite and saorview coming in on the one cable and the saorview signal tends to be much stronger.

You could also be losing strength if there are a lot of connections along the cable length - cables being split and joined at various points will result in loss of signal quality.

alan partridge aha · 12-11-2018 9:32pm

4 cables coming from lnb.
2 going to room A through double co ax sckt.
1 to Room B through double co ax sckt.
1 not connected.

1 cable from Saorview aerial through co ax sckt Room B

alan partridge aha · 12-11-2018 9:35pm

Tigerandahalf wrote: »

Have you a long run from the satellite dish to the boxes?

Is the saorview signal coming down the same cable as the satellite signal?

I have satellite and saorview coming in on the one cable and the saorview signal tends to be much stronger.

You could also be losing strength if there are a lot of connections along the cable length - cables being split and joined at various points will result in loss of signal quality.

No separate cables and Sat cables joined in attic. Then separate cable from sckt to box.

tsue921i8wljb3 · 12-11-2018 9:35pm

alan partridge aha wrote: »

4 cables coming from lnb.
2 going to room A through double co ax sckt.
1 to Room B through double co ax sckt.
1 not connected.

1 cable from Saorview aerial through co ax sckt Room B

Are the sockets new or have they been working fine for a while and this is a recent fault?

alan partridge aha · 12-11-2018 9:36pm

mr_cochise wrote: »

The fact that the saorview signal is also affected is really confusing. Is the saorview cable looped through either of the sat receivers?

No it's not

alan partridge aha · 12-11-2018 9:40pm

Elora Future Pony wrote: »

Are the sockets new or have they been working fine for a while and this is a recent fault?

House built in 2012, only used Old sky box for the the first few years then in 2014 sky hd + box. Never been right.

Only hooked up Saorview aerial and generic box a few months ago.

tsue921i8wljb3 · 12-11-2018 9:46pm

alan partridge aha wrote: »

House built in 2012, only used Old sky box for the the first few years then in 2014 sky + box. Never been right.

Only hooked up Saorview aerial and generic box a few months ago.

I'd be looking at the sockets as a potential culprit. I don't know if you have the ability or the equipment to bypass them, you'd need a few F connectors and F barrel joiners to connect the cables in the wall direct to the box as a test.

Otherwise an installer with a meter should be able to diagnose the issue in a few minutes.

alan partridge aha · 12-11-2018 9:47pm

Tnks for all the advice so far much appreciated.

alan partridge aha · 12-11-2018 9:50pm

Elora Future Pony wrote: »

I'd be looking at the sockets as a potential culprit. I don't know if you have the ability or the equipment to bypass them, you'd need a few F connectors and F barrel joiners to connect the cables in the wall direct to the box as a test.

Otherwise an installer with a meter should be able to diagnose the issue in a few minutes.

Tnks Navi, might try an bypass the sckts. If it is them what sckts do you recommend?

What type of meter?

Tigerandahalf · 12-11-2018 9:56pm

Connections at various points can be an issue.
I had an installer test a signal at a cable join and it was fine but 10 feet further on after the cable join, the signal had declined.

An installer with a meter tester might be your best bet.

alan partridge aha · 12-11-2018 9:59pm

Tigerandahalf wrote: »

Connections at various points can be an issue.
I had an installer test a signal at a cable join and it was fine but 10 feet further on after the cable join, the signal had declined.

An installer with a meter tester might be your best bet.

Tnks, I only ask would a multimeter be any good as I have one.

tsue921i8wljb3 · 12-11-2018 10:03pm

alan partridge aha wrote: »

Tnks Navi, might try an bypass the sckts. If it is them what sckts do you recommend?

What type of meter?

I'd try to get screened sockets but depending on the space behind your current sockets they may be hard/impossible to fit now. Something like this.

Another option would be something like this with the cable directly connected.

A professional satellite/terrestrial meter could cost thousands of euro.

tsue921i8wljb3 · 12-11-2018 10:05pm

alan partridge aha wrote: »

Tnks, I only ask would a multimeter be any good as I have one.

No a multimeter is no good to you here I'm afraid.

alan partridge aha · 12-11-2018 10:10pm

Elora Future Pony wrote: »

I'd try to get screened sockets but depending on the space behind your current sockets they may be hard/impossible to fit now. Something like this.

[img][/img]http://www.satcure.co.uk/tech/images/SAT_TV3.jpg

Another option would be something like this with the cable directly connected.

[img][/img]https://i.ebayimg.com/images/g/Zs0AAOSwo0JWIPSH/s-l300.jpg

A professional satellite/terrestrial meter could cost thousands of euro.

Very good the 2nd one could work alright. Tnks again.

tsue921i8wljb3 · 12-11-2018 10:12pm

alan partridge aha wrote: »

Very good the 2nd one could work alright. Tnks again.

Don't go buying stuff until it's confirmed the sockets are at fault. It's just my best guess but as I said earlier it could be other things also.

alan partridge aha · 12-11-2018 10:15pm

Elora Future Pony wrote: »

Don't go buying stuff until it's confirmed the sockets are at fault. It's just my best guess but as I said earlier it could be other things also.

Wont do that, I'll bypass 1st and see. If same thing happens then I'll look elsewhere.

NewClareman · 12-11-2018 10:34pm

alan partridge aha wrote: »

In menu of TV you can see saorview signal weaken when generic Sat box turned on. Room B

In menu of Sky + box you can see signal weaken when 2nd cable Inserted. Room A.

Are the signals weakening, or is it the quality degrading?

alan partridge aha · 12-11-2018 10:40pm

NewClareman wrote: »

Are the signals weakening, or is it the quality degrading?

Both seem to weaken.

mr_cochise · 12-11-2018 10:48pm

Theory: either faulty sockets or poor wiring of sockets is causing contact between sat cables

alan partridge aha · 12-11-2018 10:55pm

mr_cochise wrote: »

Theory: either faulty sockets or poor wiring of sockets is causing contact between sat cables

Very good tnks so it seems to go back to Sckts again

Alun · 12-11-2018 11:04pm

I'm wondering if maybe the braids of the two cables are a bit frayed and touching each other inside the socket?

alan partridge aha · 12-11-2018 11:05pm

Alun wrote: »

I'm wondering if maybe the braids of the two cables are a bit frayed and touching each other inside the socket?

I'll check that tnks

jelutong · 13-11-2018 12:39am

Is the box set to single input?

Alun · 16-11-2018 10:53am

Any update on this OP?

Tv signal loss when 2nd Sat cable inserted

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